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Micro-air-gap based intrinsic Fabry-Perot interferometric fiber-optic sensor.

Xiaopei Chen1, Fabin Shen, Zhuang Wang

  • 1Bradley Department of Electrical and Computer Engineering, Center for Photonics Technology, Virginia Polytechnic Institute and State University, Virginia 24061-0111, USA. xichen@vt.edu

Applied Optics
|October 28, 2006
PubMed
Summary

A novel intrinsic Fabry-Perot interferometric sensor using micro air gaps was developed. This fiber optic sensor demonstrates high resolution and sensitivity, offering expanded applications.

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Area of Science:

  • Optoelectronics
  • Fiber Optics
  • Sensor Technology

Background:

  • Fabry-Perot interferometers (FPIs) are widely used for sensing applications.
  • Traditional FPI sensors often face limitations in fabrication complexity and sensitivity.
  • Micro air gaps present a novel approach for FPI sensor construction.

Purpose of the Study:

  • To develop a simple intrinsic Fabry-Perot interferometric (IFPI) sensor.
  • To investigate the theoretical and experimental performance of the micro-air-gap IFPI sensor.
  • To explore the enhanced application potential of this novel sensor structure.

Main Methods:

  • Fabrication of an IFPI sensor using two micro air gaps as reflective mirrors within an optical fiber.
  • Theoretical modeling of the Fabry-Perot cavity formed by the micro air gaps.

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  • Experimental characterization to evaluate sensor resolution and sensitivity.

    • Main Results:

    • Successful fabrication of a simple intrinsic Fabry-Perot interferometric sensor.
    • Experimental validation of high resolution and high sensitivity achievable with the sensor.
    • Demonstration of two distinct micro-air-gap structures.

    Conclusions:

    • The developed micro-air-gap-based IFPI sensor offers a simple yet effective sensing solution.
    • The sensor design achieves high resolution and sensitivity, outperforming some existing IFPI sensors.
    • The two proposed structures broaden the applicability of micro-air-gap IFPI sensors in various fields.